Improvement in sash-fasteners



i. ZIMMERMAN.

Sash-Fasteners.

Patented May 19,1874.

No. 15'i,l89.

INVEJVIOR ttameys.

UNITED STATES PATENT OFFICE.

` IMPROVEMENT IN SASH'FASTENERS.

Specification forming part of Letters Patent No. 151,189, dated May 19, 1874; application filed I January 15, 1874.

To all whom lit may concern:

Beit known that 1, JOHN ZIMMEEMAN, of Graters Ford, in the county of Montgomery and State of Pennsylvania, have invented certain new and useful Improvements in Window- Sash Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this speciiication, in which- Figure 1 is a vertical section of my invention applied, the lock O being taken in line x Fig. 4. Fig. 2 is a side elevation of the lock. Fig. 3 is a side elevation of a section of a sash with lock applied, showing a modification. Fig. 4 is a front or edge view or elevation of sash with lock in position therein.

My invention has for its object to provide a window-sash lock simple in construction, easily applied, and effective in operation.

This invention will be first clearly described, and then set forth specifically in the claim.

In the accompanying drawing, which illustrates my invention, A is a window-sash, and B a jamb, to which my improvements are applied. O is the lock, formed in two sections, Cl C2, the former having walls c c c upon which the latter rests, vbeing secured thereon by means of a screw, c1, which enters the threaded stud c3. C3 is a curved wall forming a bearing for the spring E and block F. c2 c2 are studs or projections cast on the inside of the sections .Cl G2, and which serve as pivots or fulcrums for the latch or pawl D, entering recesses d d in the side thereof. E is a spring for holding the lower part of said pawl in contact wit-h the rack b and F is a sliding block, which, when pushed in by the headed-pin G, forces back the lower part of the pawl to allow the sash to descend. lt will be observed that the upper facets b1 of the rack b form an obtuse angle with the lower facets b2. By this arrangement, when the sash is pushed upwardly the pawl D will slide easily over said facets b1. Returning downwardly, however, thepawl D'en gages with the facets b2, and will hold the sash firmly in position until released by pushing in the rod G. By means of this device, then, the window may be raised with one hand, without having recourse to the lock, which, however, sustains the sash in theposi tion left on withdrawing the hand, the springpawl D operating automatically. In order to lock the sash when the window is down, I make the facet b3 horizontal. rlhe pawl D will not slide pastthis unless the rod G be pushed in, this arrangement thus forming a safe and economical lock, preventing the window, when thesash is fully lowered, from being opened by persons outside. v

If desired, instead of having a rod, G, arranged as shown in a line with the block D, and coming out beside the glass, a similar rod, H, moving in a slot, t', in a plate, I, may be arranged transversely to said block D. The operation is substantially the same in both cases, the latter arrangement being designed principally for sashes of slight depth or thickness, as those used in cars.

To apply my invention to a window the lock is fitted in the recess formed in the side of the sash, and fastened by screws k 7c. An openingas a gimlet-hole for the rod G, or a slot for the rod H-is then formed in the sash, and rod G or H inserted and screwed into the block D. A rack is then out out, or one previously made of wood or metal Amay be inserted in the jamb B. If desired the adjusters may be applied to both sides ofthe sash, but for all ordinary purposes one on one side, in my judgment, will be sufficient.

I claim- The sash-lock consisting of the casing O formed in two sections, O1 G2, and having 'the wall or bearing G3, and studs or projections c?, the pivoted dog D recessed at d, the sliding block F provided with handle G or H, spring P), and rack b, all constructed and combined as shown andspeciiied.

In testimony that I claim the foregoing I have hereunto set my hand this 10th day of January, 1874.

JOHN ZIMMERMAN.

"Witnesses GEORGE ScHATz, GEORGE PRINGLE. 

